Improvement in mole-plows



UNITED STATES HOMER GILLET, OF

PATENT OFFICE.

LYNDON, ILLINOIS.

IMPROVEMENTIN IVlOLE-PLOWS.

To all whom it may concern:

Be it knowu that I, HoMEa GILLET, of Lyndon, in the county of Whitesidesand State of Illinois, have invented a new and Improved Mole-Plow; and Ido hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure l is aperspective view of the improved mole-plow. Fig. 2 is a side elevationof the plow, representing the tooth and auxiliary beam in two positions.

Similar letters of reference indicate corresponding parts in bothfigures.

My invention consists iu combining, with an auxiliary beam and main beamand adjustable mole-tooth, a strong semi-elliptic spring and adjustablescrew-shaft, as will be hereinafter described, for the purpose ofadjustingthe auxiliary beam, and at the same timekeeping the mole-toothup with the pressure of the spring against the crown of the channel, aswill be hereinafter fully explained.

To enable those skilled in the art to fullyunderstand my invention, Iwill proceed to describe its construction and operation.

A is a fiat, strong plate of metal, brought to a beveled cutting-edgeand rigidly secured to. the beam B at, or nearly at., a right angle toits top surface. yThis colter A is secured to the rear end ot' the beamB, as represented in the drawings, and projects down a suitable distancebelow the beam. The extreme lower end of this colter has a portionprojecting from its back surface, to which the follower D is rigidlysecured..B This follower is merely an enlarged portion which follows themain part of the tooth C and nishes the channel. The follower D is aboutthe same transverse shape as the portion C, but it is slightly larger insection than the portion C. This portion D has a cavity in its frontend, into which the rear end of the tooth portion C tits and is allowedto play up and down. The tooth portion G is pivoted at a, its rear'endto the colter A, and at a to a bar, b, (represented in Fig. 1,) whichbar is passed up through a hole, which is formed in any suitable mannerthrough the colter A. This bar b is longer somewhat than the colter A,and projects above the upper end of this colter A through aplate, c,which is bolted on vtop of the beam B.

d is a hand-wheel, and e is its vertical stem, which stem has a malescrew cut on its end. This screwstem passes through a nut, f, projectingfrom the bar b, and its lower end is stepped on aiixed piece, c. Now, byturning the hand-wheel d it will raise or depress the bar b and thepoint of tooth C, as represented in Fig. 2 ofthe drawings. is adj ustedin the manner just described, is

made of the shape represented in Fig. 2, its

top and bottom surfaces being parallel, except at the front end, whichis beveled abruptly to a point. A section taken transversely throughthis tooth approaches the shape of an arch with a high crown, asrepresented in Fig. 1

H is a wide shoe, which is secured to the front part ofthe beam B,underneath the end ofthis beam. This shoe is common to all moleplows,and it is used to prevent the front end of the beam from sinking intothe Wet soil. To the rear end of this shoe His pivoted an auxiliarybeam, G, which extends back under the main beam B to the colter A, andwhen this beam Gis brought up close to the main beam B, as shown in Fig.2 in red `Ylines, its top surface is parallel with the bdttom surface ofthe beam B.

On the top and near the rear end ofthe aux iliary beam G a strongsemi-elliptic spring, K, is placed, one end of which is secured to thisbeam G and the other end is allowed to play loosely on this beam. Thepointer g, which is attached to the end ofthe spring K, is free to move,and is intended to indicate the amount of downward pressure on the beamB by its moving back or forth with the end ot' spring K.

J is a screw-bar, with a hand-wheel on its upper end, which bar passesthrough the rocking-nut J and down through the beam B. The t lower endof this screw J is stepped on the spring K, so that by turning thisscrew the auxiliary beam G may be brought nearer to or set farther fromthe beam. B. The spring K isl allowed to passup into a space formed inthe beam B, so that the beam G may be brought up close to beam B. Thislower or auxiliary beam G rests on the surface when the moletooth is inthe ground, and the shoe H also rests on the ground. The harN is pivotedat its rear end to the beam B, and its front end may be moved to theright or to the left of a line drawn longitudinally through the centerofthe beam, for changing the line of draft of This tooth C, which` themachine. The perforated sector-plate L, in combination with the beams Gand B and placed over this draft-bar N with a suitable adjusting-screwJ, as herein set forth, for the boit, is used to secure this bar N inany desired purpose described. position.

Having thus described my invention, what HOMER GILLET' I claim as new,and desire to secure by Letters Witnesses: Patent, is- JOHN WHALLON,

The spring K, or its equivalent, when used GILBERT BREWER.

